NHTSA FARS 2020–2024
Deadliest Highways and Roads in Montana
Quick answer: I-90 is the deadliest road in Montana: 115 people died in crashes on it from 2020 to 2024, the worst stretch being near Big Horn County (9 deaths within about 7 miles). Next: US-93 (75) and US-2 (67).
| # | Road | Deaths | Fatal crashes | 2020 · 2024 | Deadliest ~7-mile stretch | Counties |
|---|---|---|---|---|---|---|
| 1 | I-90 Interstate · live page |
115 | 100 | 18 → 18 | near Big Horn County: 9 deaths map | Big Horn County, Gallatin County, Yellowstone County, Jefferson County |
| 2 | US-93 U.S. Highway |
75 | 69 | 7 → 20 | near Missoula County: 7 deaths map | Lake County, Missoula County, Ravalli County, Flathead County |
| 3 | US-2 U.S. Highway |
67 | 58 | 6 → 13 | near Flathead County: 6 deaths map | Flathead County, Lincoln County, Glacier County, Roosevelt County |
| 4 | I-15 Interstate · live page |
35 | 33 | 5 → 6 | near Silver Bow County: 3 deaths map | Cascade County, Jefferson County, Pondera County, Beaverhead County |
| 5 | US-212 U.S. Highway |
31 | 27 | 4 → 3 | near Rosebud County: 3 deaths map | Rosebud County, Big Horn County, Carbon County, Powder River County |
| 6 | US-87 U.S. Highway |
31 | 25 | 7 → 9 | near Yellowstone County: 3 deaths map | Musselshell County, Judith Basin County, Yellowstone County, Chouteau County |
| 7 | SR-200 State Highway |
21 | 20 | 3 → 5 | — | Sanders County, Lewis and Clark County, Powell County, Cascade County |
| 8 | US-89 U.S. Highway |
18 | 17 | 5 → 4 | — | Cascade County, Park County, Glacier County, Meagher County |
| 9 | US-191 U.S. Highway |
16 | 15 | 1 → 5 | near Gallatin County: 3 deaths map | Gallatin County, Fergus County, Wheatland County, Phillips County |
| 10 | I-94 Interstate · live page |
15 | 15 | 4 → 5 | — | Rosebud County, Yellowstone County, Custer County, Treasure County |
| 11 | US-12 U.S. Highway |
14 | 13 | 6 → 4 | — | Broadwater County, Musselshell County, Golden Valley County, Meagher County |
| 12 | SR-83 State Highway |
10 | 9 | 1 → 4 | near Flathead County: 5 deaths map | Flathead County, Missoula County, Lake County |
| 13 | SR-35 State Highway |
7 | 7 | 2 → 2 | — | Flathead County, Lake County |
| 14 | US-310 U.S. Highway |
7 | 7 | 3 → 0 | — | Carbon County, Yellowstone County |
| 15 | US-287 U.S. Highway |
6 | 6 | 2 → 0 | near Madison County: 3 deaths map | Madison County, Broadwater County |
| 16 | SR-2 Off-Interstate Business Marker |
6 | 6 | 1 → 1 | near Silver Bow County: 3 deaths map | Silver Bow County, Jefferson County |
| 17 | SR-3 State Highway |
5 | 5 | 0 → 1 | — | Yellowstone County |
| 18 | SR-1 State Highway |
4 | 4 | 1 → 0 | — | Granite County |
| 19 | SR-69 State Highway |
4 | 4 | 2 → 1 | — | Jefferson County |
| 20 | SR-43 State Highway |
4 | 3 | 0 → 3 | — | Beaverhead County |
| 21 | SR-82 State Highway |
3 | 3 | 0 → 0 | near Flathead County: 3 deaths map | Flathead County |
| 22 | I-90W Interstate |
3 | 3 | 0 → 0 | — | Gallatin County, Mineral County |
| 23 | SR-28 State Highway |
3 | 2 | 0 → 0 | — | Sanders County |
| 24 | SR-56 State Highway |
3 | 3 | 0 → 1 | — | Lincoln County |
| 25 | SR-72 State Highway |
3 | 3 | 0 → 1 | — | Carbon County |
| 26 | SR-78 State Highway |
3 | 2 | 0 → 3 | — | Stillwater County |
Deaths = people killed in crashes on the road, 2020–2024. A crash counts for the first signed Interstate, US or State route of its location; county and unsigned roads are not ranked because their numbers repeat. The stretch is the ~7-mile square with the most deaths on that road. Source: NHTSA FARS.
More for Montana: most dangerous counties · Montana accidents today · every state · crash history along your route
Questions
Deadliest roads — FAQ
What is the deadliest highway in Montana?
I-90 is the deadliest road in Montana: 115 people died in crashes on it from 2020 to 2024, the worst stretch being near Big Horn County (9 deaths within about 7 miles). Next: US-93 (75) and US-2 (67). Long, busy highways lead on totals; the deadliest-stretch column shows where on each road the deaths cluster.
Why is there no deaths-per-mile figure?
FARS records where each fatal crash happened but not how long each route is or how much traffic it carries, so we show totals and the worst ~7-mile stretch rather than a rate we would have to estimate.
Where does this data come from?
NHTSA's Fatality Analysis Reporting System, which records every fatal crash on US public roads, for 2020–2024. Each crash is credited to the first signed Interstate, US or State route of its trafficway.